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Why we use slit width comparable to the wavelength in interference?
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In single slit if width of slit increased what will happen?
if the width of one slit is increased relative to the other the slit separation must decrease and since slit sep is inversely proportional to fringeseparationthe fringes become closer together.
Conditions for interference of light?
You mean conditions for getting sustained interference pattern with clarity. 1. Sources have to be monochromatic and coherent 2. Two sources have to be so close as far as possible 3. The screen is to be kept at far distance
Why narrow slits are taken in Young's double slit interference experiment?
to provide sufficient diffraction.
How the interference takes place in light waves?
To see the interference paterns that light will create then put a light beam through a small grate of slit. This when light is behaving as a stream of particles
What is the discovery of Thomas Young about light?
thomas young carried out his (double slit experiment) where he discussed the interference of light waves using monochromatic light . the 2 slits act as 2 coherent sources which emit light with same amplitude frequency . interference fringes appear due to superposition of light . this experiment is also used to determine the wavelength of monochromatic light. from the relation y=wavelength*distance between 2 slits /distance between the 2 slits and the screen where the fringes appear . where y is the distance between 2 successive bright or dark fringes.
What factors affecting diffraction?
Wavelength width of the slit
In double slit interference for a wavelength of 500nm the path length difference between the two waves for the second constructive interference fringe is?
1 micrometer (1,000 nm)
In single slit if width of slit increased what will happen?
if the width of one slit is increased relative to the other the slit separation must decrease and since slit sep is inversely proportional to fringeseparationthe fringes become closer together.
What condition determines the point at which the first maximum on either side of the central maximum is located in a double-slit interference pattern?
The difference in paths from each slit to that point is a single wavelength.
Why do quantitative and qualitative analyses require a different monochromator slit width?
In quantitative analyses, we use wider slit width to let the slit more brightness, to improve the sensitive of detection. In qualitative analysis, we use narrow slit to get higher resolution, avoid other light influence and to detect the specific light wavelength.
Why must the slit width of a prism monochromator be varied to provide constant effective bandwidths but a nearly constant slit width provides cnstant bandwidth with a grating monochromator?
Prisms and gratings have different dispersive properties. Grating has a linear dispersion of wavelengths meaning the band on the focal plane varies linearly with the wavelength. Prisms are not linear, the shorter the wavelength the greater the dispersion. Thus, when a spectrum is being scanned, the dispersive device needs to rotates different amounts depending on whether it is prism or grating to focus light on the exit slit. If its grating, the slit width will need to be varied minimally; if it is a prism, the slit width will need larger changes as the dispersion gets greater.
Conditions for interference of light?
You mean conditions for getting sustained interference pattern with clarity. 1. Sources have to be monochromatic and coherent 2. Two sources have to be so close as far as possible 3. The screen is to be kept at far distance
Why should slit width be approximately equal to wavelength of light for diffraction?
This is to maximize the effect of diffraction. The wavelength of the photon can be regarded as its 'size' . If it is too large then the slit is just to small for it and most of the photons will be absorbed or reflected. If it is far too small then the slit, in comparison, will be very large so most photons do not even notice its presence and will just continue on their merry way without interacting with it.
How do you find the width of a slit?
A ruler?
Is the fresnel biprism experiment better than young's double slit experiment?
yes,because in fresnel biprism the fringe width can be increased so that the dark and bright fringes can be seen clearly by naked eyes..but there is no such problem in fresnel biprism.. in young's double slit experiment, the pattern is the superposition of interference and diffraction. but in fresnel biprism it is purely interference pattern.
Why narrow slits are taken in Young's double slit interference experiment?
to provide sufficient diffraction.
What is the equation in the double slit experiment?
The equation is: nλ=d(x/l) where: n is Order of maxima λ is wavelength d is slit separation x is fringe separation l is distance from screen to double slit
